Planar Hairpin & Interdigital Microstrip Bandpass Filter Coupled-Line DXF/KiCad Generator

Deterministic Matthaei-Young-Jones J-inverter coupled-resonator synthesis -> Z0_even / Z0_odd Kirschning-Jansen coupled-microstrip gap/width inversion & open-end fringing length engine (.kicad_mod, .dxf, .s2p, .json) built for Keysight Genesys, Rogers Corporation, Isola, QucsStudio / KiCad — zero-upload ephemeral Wasm RAM execution.

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